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authorAmaury Pouly <amaury.pouly@gmail.com>2017-11-09 23:01:24 +0100
committerSolomon Peachy <pizza@shaftnet.org>2024-10-27 09:10:15 -0400
commitd22bb548b23c4281fc0fa0862333d912069752ae (patch)
tree285e61d230e9175647a520f589566bce978689c7
parent977308c95ca57ebbf00139843a8dc03f6c743a11 (diff)
downloadrockbox-d22bb548b2.tar.gz
rockbox-d22bb548b2.zip
rda5802: document some registers
This information is available in the RDA5802N or RDA5807 datasheet. I suspect that register SYSCONFIG6 is not actually used by the tuner. Based on an obscure statement in the datasheet, I guess SYSCONFIG5 is a frequency in Khz called freq_direct that offsets the lower band frequency (56/67 MHz) but 1) it is not enabled (FREQ_MODE=0) and 2) it is not clear if this offset is really just to avoid interference (ie the RF and IF are simply shifted by this amount) or an actual offset. Change-Id: Ia469f5370aee7c8c3390324d0cef1193c64df755
-rw-r--r--firmware/drivers/tuner/rda5802.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/firmware/drivers/tuner/rda5802.c b/firmware/drivers/tuner/rda5802.c
index 3f122714bd..55e775e985 100644
--- a/firmware/drivers/tuner/rda5802.c
+++ b/firmware/drivers/tuner/rda5802.c
@@ -48,9 +48,9 @@
#define SYSCONFIG1 0x4
#define SYSCONFIG2 0x5
#define SYSCONFIG3 0x6
-#define SYSCONFIG4 0x7 /* undocumented */
-#define SYSCONFIG5 0x8 /* undocumented */
-#define SYSCONFIG6 0x9 /* undocumented */
+#define SYSCONFIG4 0x7
+#define SYSCONFIG5 0x8
+#define SYSCONFIG6 0x9 /* suspected not to exists */
#define READCHAN 0xA
#define STATUSRSSI 0xB
@@ -81,7 +81,7 @@
/* SYSCONFIG1 (0x4) */
#define SYSCONFIG1_DE (0x1 << 11)
- #define SYSCONFIG1_SOFTMUTE_EN (0x1 << 9)
+#define SYSCONFIG1_SOFTMUTE_EN (0x1 << 9)
/* SYSCONFIG2 (0x5) */
#define SYSCONFIG2_VOLUME (0xF << 0)
@@ -105,9 +105,9 @@ static uint16_t cache[16] = {
[SYSCONFIG1] = 0x0200, /* SYSCONFIG1_SOFTMUTE_EN */
[SYSCONFIG2] = 0x867F, /* INT_MODE (def), SEEKTH=1100b, LNA_PORT_SEL=LNAN,
LNA_ICSEL=3.0mA, VOLUME=max */
- [SYSCONFIG3] = 0x8000, /* I2S slave mode */
- [SYSCONFIG4] = 0x4712, /* undocumented, affects stereo blend */
- [SYSCONFIG5] = 0x5EC6, /* undocumented */
+ [SYSCONFIG3] = 0x8000, /* RSVD */
+ [SYSCONFIG4] = 0x4712, /* TH_SOFRBLEND=34dB, 65M_50M MODE=65~76MHz, RSVD, SEEK_TH_OLD=4, SOFTBLEND_EN */
+ [SYSCONFIG5] = 0x5EC6, /* FREQ_DIRECT=24262kHz (unused) */
[SYSCONFIG6] = 0x0000 /* undocumented */
};